Peer-reviewed veterinary case report
Blood vessel inflammation linked to parrot bornavirus
By Chénier, Sonia et al.·Published in Journal of comparative pathology·2022·Laboratoire de Santé, Canada·View original on PubMed →
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Original publication title: Vasculitis Associated with Parrot Bornavirus 4 Infection in a Rose-Crowned Parakeet (Pyrrhurarhodocephala).
- Species:
- bird
Plain-English summary
A 3-month-old female rose-crowned parakeet was found dead after showing signs of lethargy and passing blood-tinged droppings for a day. A thorough examination revealed serious damage in various organs, including the heart and kidneys, likely caused by an infection with parrot bornavirus (PaBV-4). The virus may have triggered immune responses that led to inflammation and damage to blood vessels. Unfortunately, the parakeet did not survive, highlighting the severe impact of this viral infection on young birds.
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Abstract
A 3-month-old, female rose-crowned parakeet (Pyrrhura rhodocephala) was found dead after a 24-h course of lethargy and passing blood-tinged faeces. Fine white streaks were seen in the pectoral muscles on necropsy. Microscopic examination revealed typical lesions of avian ganglioneuritis and vascular necrosis in the pectoral muscles, myocardium, kidneys, air sacs, adrenal glands, pancreas and thyroid gland. These lesions were characterized by mural fibrinoid necrosis of small and medium-calibre arteries and arterioles, associated with lymphoplasmacytic inflammation, necrosis, atrophy and fibrosis of the surrounding tissues. Parrot bornavirus (PaBV) nucleoprotein was demonstrated by immunohistochemistry in smooth muscle and endothelial cells of many vessels. An avian bornavirus was isolated from kidney tissue and its identity confirmed as PaBV-4 by sequencing and phylogenetic analysis. We postulate that the vascular lesions could have been immune-mediated and that PaBV-4 may have played a role in its pathogenesis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/36008044/